Wrench



- slides on the handle a.

iTEn srATEs PATENT OFFICE.

STEPHEN KANE, THOMAS KEANE, AND JAMES KEANE, OF NEW YORK, N. Y.

SCREW-WRENCH.

Specification of Letters Patent No. 1,720, dated August 12, 1840.

To all whom it may concern:

Be it known that we, STEPHEN KANE, THOMAS KEANE, and J AMEs KEANE, allof the city, county, and State of New York, machinists, have madecertain new and useful Improvements in the Construction of the ToolCommonly Known as the Screw-Trench, whereby the said instrument is mademore efficiently available for general use, and for which improvementswe seek Letters Patent of the United States, and that the saidimprovements are substantially and fully set forth and shown in thefollowing description and in the drawing annexed to and making part ofthis specification, wherein The principal Figure 1 is a representationof the head jaw and shaft or handle of screw wrench with ourimprovements at tached for use. Fig. 2 is a plan of the moving oradjustable parts and Fig. 3 is a representation of the same parts seenvertically on the side next the shaft or handle, the same letters asmarks of reference applying to the same parts in all the figures.

a is the shaft or handle of the tool or instrument; b, the head or fixedjaw; c, the movable jaw, with a mortise or slot d which The lug e of thejaw c, finishes in a stout arbor j which goes through a keeper slide 9also formed to slide on the arm a. Upon the arbor f is a short stoutscrew it fitted to revolve upon the arbor f, the threads of this screwit, fit into cor responding worm teeth 11, i, cut into the edge of thehandle a, the lower part of the screw it may be made square orsexangular. octang- -mortises wherein to insert the end of a tommy orsmall lever to tighten or loosen the hold of the jaws when needful andthe connect-ion of the whole is maintained by a screw and nut is on theend of the arbor of outside the keeper slide 9. When thus fitted for usea workman can quickly and firmly compress any article to be held betweenthe jaws by turning the screw it to approximate the jaws, or release thehold of the jaws by reversing the motion.

l/Ve do not claim to have invented a screw wrench but we claim as newand of our own invention The mode of constructingthe movable jaw bycombining therewith a revolving screw whose threads work into worm teethout into the edge of the wrench handle substantially as such mode ishereinbefore described and set forth.

In witness whereof we have hereunto set our hands in the city of NewYork this twenty-seventh day of June one thousand eight hundred andforty.

STEPHEN KANE. [L. s] THoMAs KEANE. 1 3. JAMES KEANE. [n 8.]

Witnesses:

H. R. SEwELL, JOHN THoRP.

